Rotating-cylinder pump.



No. 697,0I9. Patented :Apr. 8, I902.

R. 'mcummson.

ROTATING CYLINDER PUMP.

- (Application filed Feb. 3, 1900. r (No Model.) 5 Sheets-Sheet I.

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Nb. 697,0l9. Patented Apr. 3, I902. n. RICHARDSON.

ROTATING CYLINDER PUMP.

(Applicatibn filed Feb. 3. IGOR) (No Model.) 5Sheets-Sheet 2.

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No. 697,019. ;P atented'Apr.8, I902.

R. RICHARDSON. ROTATING CYLINDER PUMP.

(Application filed Feb. 3, 1900.)

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I Patented Apr. 8,1902. R. RICHARDSON. BOTATINGDGYLINDER PUMP.

(Application filed E51). :3, 1900.

5 Sheets8hout 4.

No. 697,0l9.

(No Model.)-

in. 97,019. Patented Apr. 8, I902. R. RICHARDSON.- RUTATING CYLINDERPUMP.

(Apfilication filed Feb. 3, i900.

UNTTn-n STATES PATENT OFFICE.

ROBERT RICHARDSON, OF GLASGOW, SCOTLAND.

ROTATING-CYLINDER PUMP.

SPECIFICATION forming part of Letters Patent No. 697,019, dated April 8,1902.

Application filed February 3,1900. Serial No. 8,769. (No model.)

To all whom it may concern:

Be it known that 1, ROBERT RICHARDSON, a citizen of the United Kingdomof Great Britain and Ireland,residing at 16 Jamieson street, Govanhill,Glasgow, Scotland, have invented certain new and useful Improvements inR0- tating-Cylinder Pumps, (which have been patented in Great Britain onthe 5th day of July, 1899, No. 13,866,) of which the following is aspecification.

This invention relates to an improved construction of pump wherein anumber of cylinders are disposed in approximately radial lines around acentral boss, on which they are cast or fitted to rotate therewith upona fixed shaft or center, through which the inlet and outlet passages forthe water or other fluid are formed.

The invention is illustrated by the accompanying drawings, Figure 1being an elevation with the front plate of the casing re moved andshowing part of the pump in section. Fig. 2 is a vertical section atright angles to Fig. 1; and Fig. 3 is a horizontal section on the line:0 m, Fig. 2. Fig. 4 is a view corresponding to Fig. 1, and-Fig. 5 aview corresponding to Fig. 2, of a modification in which two series ofcylinders are arranged along the central boss side by side, the centerlines of one series being equidistant between the other series, so as togive a tencylinder effect. Figs. 6 and 7 are views corresponding toFigs. 1 and 2, but showing the outer casing dispensed with and a lightbox substituted.

As shown by the drawings, a number of cylinders A are formed in a singlecasting or carrier, which is fitted on or has a boss A formed integraltherewith. The inner ends of the cylinders A are formed with ports Apassing through the boss A and preferably through an inner liner B, ofbrass, lignumvitae, or other material, revolvingupon a fixed centralstud H, secured to the casing I, while the outer ends are open and arefitted with pistons or plungers 0, having connecting-rods D, whose endsare attached to a disk E, (or pair of disks,) bolted together, as in themodifications shown, carried by a driving-shaft F, which is eccentric tothat whereon the boss revolves. The disk or disks E and cylinder castingor carrier are connected by cranked coupling-rods G, so that they rotatein unison and a true relation is maintained between them, whilereciprocating motion is imparted to the several pistons 0 through theirconnecting-rods D, owing to the disk or disks E and cylindercastingrotating on different centers. In the fixed central stud H inlet anddischarge passages H and H are formed longitudinally, and ports H H,separated from each other by bridge-pieces H H communicate,respectively, with the inlet and discharge passages. The ports A in thecylinder-carrier boss communicate alternately with the inlet anddischarge ports H H, so that the Water from the inlet H is forced by theaction of the pistons 0 through the discharge-passage H In lieu of theconnecting-rods D, attached to the disk or disks E, other means may beemployed for reciprocating the pistons or plungers G.

The fixed central stud H, on which the cylinder-casting revolves, ispreferably placed horizontally, and the inlet-port H for the water isformed around thelower side, while the outlet-port H is formed at theupper part of the center, the center being thus reduced to a web Hseparating the inlet and discharge passages. In order that a Water-tightjoint may be maintained notwithstanding wear of the liner B and centralstud H, the discharge or outlet H is made much smaller than the inlet,and the liner B bears on a portion of the fixed central stud composed ofthe two bridge-pieces 11 H the portion embraced by the outer edges ofthese bridge-pieces preferably extending only around about a fourth ofthe circumference and placed in such a position relatively to thecylinder-carrier as to be pressed upon by said casting or its linerduring the most effective portion of the 'pister is allowed to return tothe inlet-passage H and the full stroke is not utilized, but only aportion, which may be taken at the most effective travel of the pistonsor plungers C, and in order to permit of the return of the water thebridge-pieces H H which separate the inlet and discharge ports I-I H arepreferablymade slightlysmaller than the ports A leading to the cylinderends. The flow of water from the cylinders is thus not at any timeentirely shut off,and strain upon the pump is consequently avoided.

The driving-shaft F may be pressed by a spring J from its outer end, soas to press against the cylinder-boss A, which in turn bears against anenlarged part of the fixed central stud H, so as to prevent leakage ofthe inlet H, or the cylinder-boss may bear against a separate boss K,surrounding the fixed central stud H and to which the latter is secured,this boss K being provided in order that the fixed center may be morereadily removable without disturbing the other' parts of the pump.

The cylinders are intended to be rotated at a high speed, and the numberof cylinders (of which there must be not less than five, as shown atFigs. 1, 2, and 3, and may bea multiple of five, as shown at Figs.4 and5) should be such as to give a continuous uniform fiow and entirely doaway with pulsation. Owing to the high speed it may be found necessaryto force the water into the inlet H, and where pressure is not availablea centrifugal pump may be fitted on the driving-spindle F, the dischargefrom which would go to the inlet H of the improved rotating pump.

The outer casing I may be dispensed with and a light box M, preferablyformed by the disks, as shown at Figs. 6 and 7, be substituted, the endof the central stud H (and also the liner 1:"- when such is used) beingbored to admit free passage of the iulet water which would then fill thebox. Any escape of Water on the pressure side would thus pass into thebox and thence into the inlet-passage, where it would be drawn into andfinally expelled from the cylinder.

Having now described the inveution,-what I claim, and desire to secureby Letters Patent, is-

1. A rotating-cylinder pump consisting of not less than five cylindersdisposed radially around a central hollow boss, port-s communicatin gwith the bottoms of the cylinders and the'center of the boss, a fixedcentral stud upon which the boss of the cylinder casting or carrierrevolves, said central stud having a bearing-surface of about one-fourthof its circumference which as the surfaces wear automatically maintainsa fluid-tight joint and thus prevents leakage between the fixed cen terand the cylinder-boss without the aid of packing, inlet and outletpassages in said fixed central stud for the water or other liquid, portscommunicatingperiodically with the ports in the bottom ofthecylinders,pistons in said cylinders and rods connecting the pistonswith a disk or disks driven by a shaft eccentric to the fixed centralstud upon which the cylindercarrier revolves, substantially asdescribed.

2. In a rotating-cylinder pump having a rotating cylinder-carrier onwhich five cylinders or a multiple of five cylinders are disposed, and adisk or disks to which the cylinder-plungers are attached rotatingeccentrically to said cylinder-carrier, a fixed central stud havinginlet and outlet passages and ports and a bearing-surface consisting ofthe bridge-pieces between which the outlet-port is situated, saidbearing-surface extending around about one-fourth of the periphery ofthe central stud, and being placed in such a position relatively to thecylinder-carrier as to be pressed upon by said carrier or its linerduring the most effective portion of the pistonstroke whereby leakagebetween the fixed center and the boss of the cylinder-castingisprevented, substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

ROBERT RICHARDSON.

Witnesses:

WALLACE FAIRWEATHER, J NO. ARMSTRONG, J um.

